There are times when you would want to check connectivity to your servers without actually login or SSH. You can use telnet on port 22. But here are few other ways:
I'm Ashwani Kumar.
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theashwanikOpenVPN on Raspberry Pi
Everyone loves something Free.
Open and Free wireless is everywhere, but should you be connecting to it. The answer is NO. You shouldn.t be connecting to it, dont connect to your social networks, don't check your bank account on it unless you want somebody else to be able to sneak on it.
The solution? A virtual private network, or VPN. A VPN extends your own private network into public places, so even if you.re using Starbucks. Wi-Fi connection, your Internet browsing stays encrypted and secure.
IP Address GeoCoding and Plotting on Map
Sometimes back I had setup ssh on raspberry pi and allowed to login from internet, obviously using the public key encyption. After few days I noticed that lot of people/systems were trying to login and failing from various different IPs. So I block them using Fail2ban. I am Not gonna talk about Fail2ban, as its completely vast topic on its own.